<!doctype html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport"
          content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>State状态</title>
</head>
<body>
<!--准备好的容器-->
<div id="test">

</div>
</body>
<!--引入babel，用于将jsx转为js-->
<script src="../js/babel.min.js"></script>
<!--核心库引入顺序，必须先是核心库然后在引入dom库-->
<script src="../js/react.development.js"></script>
<!--用于支持react操作dom-->
<script src="../js/react-dom.development.js"></script>

<!--此处的type必须是Babel不能是JavaScript-->
<script type="text/babel">
    //1.创建组件
    class Weather extends React.Component {
        //初始化状态
        state = {isHot: false, wind: '微风'}

        render() {
            const {isHot, wind} = this.state
            return <h1 onClick={this.changeWeather}>今天天气很{isHot ? '炎热' : '寒冷'},{wind}</h1>
        }

        //自定义方法 - 要用赋值语句的形式+箭头函数
        changeWeather = () => {
            this.setState({isHot: !this.state.isHot})
        }
    }

    //2.渲染组件到页面
    ReactDOM.render(<Weather/>, document.getElementById('test'))
</script>
</html>